<?php


namespace App\Services;


use Illuminate\Support\Facades\Request;

class Common
{

    public static function curlPost($url = '', $param = '')
    {
        if (empty($url) || empty($param)) {
            return false;
        }

        $postUrl = $url;
        $curlPost = $param;
        // 初始化curl
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $postUrl);
        curl_setopt($curl, CURLOPT_HEADER, 0);
        // 要求结果为字符串且输出到屏幕上
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        // post提交方式
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $curlPost);
        // 运行curl
        $data = curl_exec($curl);
        curl_close($curl);

        return $data;
    }

    public static function getAccessToken($ApiKey = '', $SecretKey = '', $grantType = 'client_credentials')
    {

        $url = 'https://aip.baidubce.com/oauth/2.0/token';
        $post_data['grant_type'] = $grantType;
        $post_data['client_id'] = $ApiKey;
        $post_data['client_secret'] = $SecretKey;
        $o = "";
        foreach ($post_data as $k => $v) {
            $o .= "$k=" . urlencode($v) . "&";
        }
        $post_data = substr($o, 0, -1);

        $res = self::curlPost($url, $post_data);
        //进行把返回结果转成数组
        $res = json_decode($res, true);
        if (isset($res['error'])) {
            exit('API Key或者Secret Key不正确');
        }
        $accessToken = $res['access_token'];
        return $accessToken;
    }






}
